This is a question I can definitely answer. First of all, I know Bits n Pieces, it's my local shop. The hanger is hung with 3M Command Strips. The magnets are round and really strong. The metal bar that comes with it goes in the sleeve on the back of your quilt. I like using it on my door so that I can hang different door designs regularly. I have heard customers in the shop say that they really like their's as well. I am not an employee there, just a customer who sews there on average 3 times a week. I have not placed mine on my wall. Just on my door but friends have put them on the wall. As for damage, I haven't heard of any and we see the man who created the hanger at shows and his booth is always swamped.